Quiz: Molecules and Cells
The quiz:
Covers the Learn material from Module 2: Week 2.
Contains 25 multiple-choice questions.
Is limited to 50 minutes.
Allows 1 attempt.
Is worth 80 points.
Question 1
3.2 / 3.2 pts
The four major classes of biomolecules are:
oprimary, secondary, tertiary, and quaternary proteins.
opurines, pyrimidines, sugars, and phosphates.
carbohydrates, lipids, proteins, and nucleic acids.
osugars, disaccharides, celluloses, and starches.
oamylose, amylopectin’s, cellulose, and glycogen.
Question 2
3.2 / 3.2 pts
In a eukaryotic cell the reactions of _______ process energy into
the form of ATP within a structure called the __________.
oRNA production, nucleus
obacterial destruction, lysosome
cell respiration, mitochondrion
oprotein synthesis, ribosome
oribosome production, nucleolus
Question 3
3.2 / 3.2 pts
A five-carbon sugar that is bonded to a nitrogen-containing base
and to either one, two or three phosphate groups is known as a(n)
_________ monomer.
ocarbohydrate
oamino acid
ofatty acid
nucleotide
ostarch
Question 4
3.2 / 3.2 pts
The binding of acetylcholine to an acinar cell surface receptor
protein causes an immediate
ochange in the DNA being copied in the nucleus.
orupturing of the acinar cell membrane.
oreverse in flow of vesicles between the endoplasmic reticulum
and the Golgi complex.
oinflow of starch molecules into the acinar cells.
change in the calcium ion concentration within the acinar cell
cytoplasm.
Question 5
3.2 / 3.2 pts
The boundary around a prokaryotic cell can best be described as
oa cell wall
oa cell membrane
oa cell wall plus a cell membrane
oa cell wall plus two separate membranes
c) or d) above
Question 6
3.2 / 3.2 pts
Which of the following is a class of monomers used as building
blocks in the polymers of living organisms?
oDNAs
ocelluloses
otriglycerides
amino acids
oproteins
Question 7
3.2 / 3.2 pts
Within an acinar cell, the enzyme amylase reaches its final form
within
othe nucleus.
the Golgi complex
othe rough endoplasmic reticulum (RER)
othe ribosome.
othe cytoplasmic fluid.
Question 8
0 / 3.2 pts
An amino group, a carboxylic acid group, a hydrogen atom and
one or more atoms composing a side chain (“R” group) all
together make up a monomer called
oa nucleotide.
oa sugar.
oa fat.
an amino acid.
oDNA.
Question 9
3.2 / 3.2 pts
Respiratory proteins, ion channels, transport proteins and
attachment point proteins are all examples of protein found
within the membrane of a prokaryotic bacterial cell.
obound along the structure of the bacterial cell’s DNA.
oin and around the nucleoid of the bacterial cell.
oare broken down as soon as the cell’s energy levels fall.
oin the cell cytoplasm of higher plants.
Question 10
3.2 / 3.2 pts
The bases in a DNA molecule include all of the following except
oadenine.
othymine.
ocytosine.
oguanine.
uracil.
Question 11
3.2 / 3.2 pts
The saturated fats of animals differ from the unsaturated ones of
plants. Unsaturated fats have
ohigher molecular weights.
omore metabolic processes that they participate in.
onitrogen atoms in their structures.
a higher number of double bonds between carbon atoms in
their structures.
omore functional utility in animal species, particularly in
marine life forms.
Question 12
3.2 / 3.2 pts
____ are little molecular machines (eukaryotic cell structures) that
move vesicles and organelles throughout the cytoplasm of the cell.
ocell membranes
oGolgi sacs
kinesins
ochromatin
onuclear membranes
Question 13
3.2 / 3.2 pts
A carbohydrate contains ________ atoms.
onitrogen
osulfur and hydrogen
carbon, hydrogen, and oxygen
ocarbon, nitrogen, oxygen, and hydrogen
ocarbon, oxygen, and nitrogen
Question 14
3.2 / 3.2 pts
Five of the six carbon atoms in a glucose molecule are typically
found
obonded to a central nitrogen atom.
owith two oxygen atoms attached to each of them.
bonded together with an oxygen atom in a ring structure.
odoubly bonded to a sodium ion.
obonded to the carbons of a glycerol molecule.
Question 15
3.2 / 3.2 pts
The nucleoid of a prokaryotic organism contains
DNA and proteins.
ofunctioning ribosomes.
olysosomes.
ocontracting vacuoles.
olipid bilayers.
Question 16
3.2 / 3.2 pts
An important function of the eukaryotic cell membrane is to
ogenerate new genetic information for the cell.
maintain the high level of orderliness found within the cell.
orun the reactions that produce cellular energy for biosynthesis.
odegrade worn out parts of the cell interior.
ocapture solar energy to pass on to the mitochondria.
Question 17
3.2 / 3.2 pts
Cells are small because
the diffusion rate of molecules won’t support life over greater
distances.
otemperatures would remain too low if cells were larger.
othe cell wall involves many processes and takes a lot of time to
build.
otheir cytoplasm gets too viscous (syrupy) if they are larger.in
size.
otheir nuclei can only contain a limited number of pores.
Question 18
3.2/ 3.2 pts
The function of glycogen is to
obreak down fat molecules for release of energy in adipose
tissue.
oprovide a quick energy source in muscle cells.
oprovide rigidity of structure in the wood of a tree.
obind monosaccharide sugars together to form polysaccharides.
store energy in the liver when glucose levels in the blood are
adequate.
Question 19
3.2 / 3.2 pts
A prokaryotic cell is protected against osmotic swelling and
rupture by its
oplasma membrane.
cell wall.
olysosomes.
ovacuoles.
onucleus.
Question 20
3.2 / 3.2 pts
Which of the following statements is an element of cell theory?
oAll cells contain cell nuclei.
All cells come from pre-existing cells.
oAll cells are parts of multicellular organisms.
oAll cells in a given organism are the same in size.
oCells are bounded by a double membrane.
Question 21
3.2 / 3.2 pts
The structure of a phospholipid molecules admirably suits it to
the function of
ocarrying genetic information.
obeing a rapid source of cellular energy during periods of intense
synthesis.
ocatalyzing chemical reactions.
separating a cell’s internal aqueous environment from the
external one.
otransporting oxygen in the blood.
Question 22
3.2 / 3.2 pts
Some bacterium always lives in surroundings with the same
concentration of dissolved substances as in their own cytoplasm.
These bacteria will not need
ocomplex ribosomes.
olong chromosomes.
thick cell walls.
omembranes of any kind.
oa light source.
Question 23
0 / 3.2 pts
What stimulates the release of the enzyme amylase into the
pancreatic duct so that it can break down starches?
acetylcholine molecules from a nearby neuron
othe breakdown of glucose in the chloroplast
othe division of the cell
othe presence of protein in the stomach
oa decrease in the volume of the large intestine
Question 24
3.2/ 3.2 pts
Testosterone signals all of the following in the human male except:
osperm production.
oincreased muscle mass.
ovocal cord thickening.
differentiation of the pancreas.
obone lengthening.
Question 25
3.2 / 3.2 pts
A phospholipid is made up of:
oa phosphate-containing group.
ofatty acids.
oa glycerol molecule.
all of the above.
onone of the above.
